Electrical fitting



Oct. 17, 1933. I Q DOANE 1,930,927

ELECTRICAL FITTING Filed March 1'7, 1932 v INVENTOR Ze/g Cflaa/re. BY

mmmm/ ATTORNEY Patented Got. 17, 1933 PATENT @FFEQE ELECTRICAL FITTINGLeroy C. Deane, Meriden, Conn, assignor to The Miller Company, Meriden,Conn, a corporation of Connecticut Application March 17,

8 Claims.

The present invention relates to electrical fittings.

The present invention contemplates an arrangement of electrical fittingsadapted for use with fixtures and lamps wherein a self-wiring supportingmember and a self-wiring coupling member adapted to be secured togetherand to support between them the socket carrying element of the lamp orfixture. The self-wiring coupling member is provided with externallyaccessible pins adapted to receive receptacles on the ends of wireswhich supply the lamp socket or ockets of the lamp or fixture.

Other and further objects of the invention will appear the descriptionproceeds.

The accompanying drawing shows, for pur= poses of illustrating thepresent invention, one of the many embodiments, with modifications, inwhich the invention may take form, it being u erstood that the drawingis illustrative of the invention rather than limiting the same. thedrawing:

g. 1 is an elevational view of a suspended nting with parts in sectionand showin dot and dash lines the position of the 1 such an element isshown in the form of a long pendant standard or tube 15. It is proviiedwith the self-wiring connections as usual. The lower end of the couplingmember or tube 15 has a threaded stud indicated in dotted lines at 13,and concentric contacts, not shown, similar to that carried by thefitting 12.

Either the fitting 12 or the lower end of the extension tube 15, may beemployed for supporting the other parts of the fixture, A c p i 1932.Serial No. 599,447

member 16, shown in detail in Figs. 2 and 3, is employed to support thefixture. This coupling member has a metal housing 17 counterbored fromthe lower end to receive insulating and conducting elements to bedescribed.

At the upper end the opening 18 is hexagonal, as shown in Fig. 3. Itreceives an insulating bushing 19. The insulating bushing 19 receives ametal bushing 20 having a hexagonal flange 21 to fit a hexagonal recessin the bushing 19, so that the metal bushing 20 is not rotatable withinthe housing 17.

An insulating unit comprisingthree washers 22, 23, and 24 is alsoreceived in the housing 17. These washers carry an'axially disposed pin25 cooperative with the tubular member 14, and two insulating pins 26and 27. The pin 26 is connected with the pin 25 and the pin 27 extendsthrough the three washers and has a head which engages with the metalbushing 20, as shown. An insulating bushing 29 is also received in thehousing 17, this bushing having recesses or drillings, 30 and 31 intowhich the pins 26 and 27 protrude. The end 32 of the housing 17 isrolled inwardly, as shown, so as to look all these insulating parts inplace.

The fittings just described are suitable for use in' self-wiringelectrical apparatus having the concentric contact arrangement wheneverit is desired to provide protected pins to receive receptacles on theends of wires. it is also suitable for use as an attaching or securingmember where one desires to attach a fixture or lamp part to the support(such as the member 15) having the threadedoonducting stud. Such afixture or lamp part may be provided with a comparatively thin ring orflange having an aperture {larger than the stud and suitably shaped tokeep it out of contact with the stud.

Fig. 1 shows a form of lighting fixture which may be supported from apendant stem by such a fitting. The structure of the fixture forms thesubject matter of the application Serial No. 546,645, filed December 10,1932.

The fixture employs a stamped or spun body 10 of trough or pan-likeshape having an inwardly drawn ring-like element 41 provided with a holeconsiderably larger than the stud 13 or 13". The configuration of thestamping is such that it fits closely about the lower end of the stem 15so as to center the stamping and prevent its coming in contact with thelive stem 13 or 13. The pan is supported in place, as will be obvious bythreading the part 16 on to the stud. The 1 1 .1 or "trough-formingmember carries a number of depending straps indicated at 42 to which aresecured lamp sockets 43 to carry lamp bulbs 44. lhese lamp sockets areconnected together by wires indicated at 45 and 46 and the wires areprovided with receptacles 47 adapted to be received by the pins 26 and27 so that the lamp sockets may be readily wired in without the use oftools.

She pan 40 carries straps 50 having outward extensions 51 to which clips52 are secured by thumb screws 54. These clips support a glass plate 55.

The employment of the fitting 16 for supporting a lamp bracket having aring embracing the fitting 16 (instead of the stem 15) is shown in myapplication Serial No. 570,533, filed October 23, 1931.

It is obvious that the invention may be embodied in many forms andconstructions, and I wish it to be understood that the particular formsshown are but a few of the many forms. Various modifications and changesbeing possible, I do not otherwise limit myself in any way with respectthereto.

I claim:

1. A lighting fixture comprising a pendant support, a downwardlyprojecting, externally threaded conductor insulatedly carried by thesupport, an axially disposed insulated conducting tube secured insidethe threaded conductor, a lighting fixture body carrying a plurality oflamp sockets together with wiring interconnecting the sockets andreceptacles, the body being aperture-d to pass over the first conductor,and a fixture body securing member having an internally threadedconducting bushing to cooperate with the externally threaded conductorand an axially disposed conducting pin to fit the tube, externallyaccessible pins to receive the receptacles on the wires and connectionsbetween the second pins and the two concentric conductors.

2. In a lighting fixture, the combination with a ceiling supportedmember adapted to support a fixture and supply current connections forthe same provided with an insulatedly supported, downwardly projecting,tubular stud externally threaded and with an internally disposedinsulated tubular conductor therein, of a fixture body apertured to passover the stud, a fixture body securing member having an insulatedlysupported axial pin within a concentric threaded bushing insulated fromthe pin, the bushing and pin being cooperative with the stud and tubularconductor respectively, the securing member also having two externallyaccessible conducting pins, one connected to the first pin and the otherto the bushing, lamp sockets carried by the fixture body, and wiresinterconnecting the sockets with one another and connected toreceptacles adapted for insertion into the second mentioned pins.

3. In a li hting appliance, a supporting memaer provided with aninsulatedly supported projecting tubular stud externally threaded andwith an internally disposed insulated tubular conductor therein, and acoupling member having an insulatedly supported axial pin within aconcentric threaded bushing, the bushing and oin being cooperative withthe stud and tubular conductor respectively, the coupling member alsohaving two externally accessible pins, one connected with the first pinand the other with the bushing.

i. A lighting appliance comprising a supporting member provided with aninsulatedly supported projecting tubular stud externally threaded andwith an internally disposed insulated tubular conductor therein, acoupling member having an insulatedly supported axial pin within aconcentric threaded bushing, the bushing and pin being cooperative withthe stud and tubular conductor respectively, the coupling member alsohaving two externally accessible pins, one connected with the first pinand the other with the bushing, each of the members having a metallichousing, and a lamp socket carrying member having a metallic ring-likeelement adapted to be placed between the members, and an element out ofthe plane of the ring-like element for engaging one of the housings tokeep the ring-like element out of contact with the stud.

5. A connector comprising a body member, concentric current supplycontacts, the external contact being internally threaded and the innercontact being in the form of an axial pin, two output terminals in theform of pins, oneoutput terminal being connected with the externalcontact, the other output terminal being connected with the innercontact, and means for insulatedly and non-rotatably supporting theterminals and contacts in the body member.

6. A connector comprising a tubular body member having an internalshoulder near one end and being non-circular between the shoulder andadjacent end, a non-circular insulating bushing fitted against theshoulder and received within the non-circular portion of the body, aninternally threaded metal bushing non-rotatably received within theinsulating bushing, and an insulating insert secured within the bodymember, said insert carrying an axially disposed pin projecting into thethreaded bushing and two oppositely projecting pins, one connected tothe first pin and the other in contact with the metallic bushing, and aninsulating bushing received in the body member, the bushing havingoutwardly opening cavities to receive the second mentioned pins.

8. A connector having insulatedly supported concentric contacts one ofwhich is threaded whereby the connector may be secured in conductingrelation to a connector having cooperative contacts, and insulatedlysupported conducting pins, a tubular housing for the contacts,

pins, and insulating supports, the pins being accessible through the endof the housing opposite the concentric contacts for the attachment ofcooperative receptacles.

LEROY C. DOANE.

